Class FibonacciRetracementAnnotationCreationModifier

A modifier for creating FibonacciRetracementAnnotation instances via a two-point tap-to-place or single continuous drag workflow.

If the finger moves beyond a small threshold before the first touch-up, both anchor points are placed immediately from the drag gesture and the annotation is finalized. Otherwise, each touch-up places the next anchor point (start, then end) with a rubber-band preview line shown between the last confirmed point and the current touch position.

Extensibility: This modifier is designed to be easily subclassed. Override any of the following protected methods to customize behavior:

Inheritance
java.lang.Object
ReceiveMotionEventsBase
ChartModifierCore
ChartModifierBase
TouchModifierBase
FibonacciRetracementAnnotationCreationModifier
Inherited Members
Namespace:
Assembly: .dll
Syntax
public class FibonacciRetracementAnnotationCreationModifier extends TouchModifierBase

Constructors

FibonacciRetracementAnnotationCreationModifier()

Declaration
public FibonacciRetracementAnnotationCreationModifier()

Methods

configureRubberBandAnnotation(IAnnotation annotation)

Configures the rubber-band preview annotation after creation.

Declaration
protected void configureRubberBandAnnotation(IAnnotation annotation)
Parameters
Type Name Description
IAnnotation annotation

createAnnotation(Context context)

Creates a new FibonacciRetracementAnnotation instance to be placed on the chart. Override this method to return a custom subclass with different default styling.

Declaration
protected tradingAnnotations.FibonacciRetracementAnnotation createAnnotation(Context context)
Parameters
Type Name Description
Context context
Returns
Type Description
tradingAnnotations.FibonacciRetracementAnnotation

createOrUpdateRubberBandAnnotation(PointF fromPoint)

Declaration
protected void createOrUpdateRubberBandAnnotation(PointF fromPoint)
Parameters
Type Name Description
PointF fromPoint

createRubberBandAnnotation(Context context)

Creates the rubber-band preview annotation used to show the next segment while the user is placing points. By default, this creates a LineAnnotation.

Declaration
protected IAnnotation createRubberBandAnnotation(Context context)
Parameters
Type Name Description
Context context
Returns
Type Description
IAnnotation

getCurrentAnnotation()

Gets the FibonacciRetracementAnnotation currently being created, or null if no creation is in progress.

Declaration
public final tradingAnnotations.FibonacciRetracementAnnotation getCurrentAnnotation()
Returns
Type Description
tradingAnnotations.FibonacciRetracementAnnotation

getCurrentPointIndex()

Gets the index of the next anchor point to be placed (0-based: 0 = start, 1 = end).

Declaration
public final int getCurrentPointIndex()
Returns
Type Description
int

getLabelFormat()

Declaration
public final tradingAnnotations.FibonacciRetracementAnnotation.LabelFormat getLabelFormat()
Returns
Type Description
tradingAnnotations.FibonacciRetracementAnnotation.LabelFormat

getLabelPlacement()

Declaration
public final tradingAnnotations.FibonacciRetracementAnnotation.LabelPlacement getLabelPlacement()
Returns
Type Description
tradingAnnotations.FibonacciRetracementAnnotation.LabelPlacement

getLabelVerticalPosition()

Declaration
public final tradingAnnotations.FibonacciRetracementAnnotation.LabelVerticalPosition getLabelVerticalPosition()
Returns
Type Description
tradingAnnotations.FibonacciRetracementAnnotation.LabelVerticalPosition

getRubberBandAnnotation()

Declaration
public final IAnnotation getRubberBandAnnotation()
Returns
Type Description
IAnnotation

getRubberBandStroke()

Declaration
public final PenStyle getRubberBandStroke()
Returns
Type Description
PenStyle

getXAxisId()

Declaration
public final String getXAxisId()
Returns
Type Description
String

getYAxisId()

Declaration
public final String getYAxisId()
Returns
Type Description
String

onAnnotationCreated(IAnnotation newAnnotation)

Called when the Fibonacci Retracement annotation is fully created (both anchor points placed).

Declaration
protected void onAnnotationCreated(IAnnotation newAnnotation)
Parameters
Type Name Description
IAnnotation newAnnotation

onTouchDown(ModifierTouchEventArgs args)

Called when MotionEvent#ACTION_DOWN event occurs

Declaration
protected boolean onTouchDown(ModifierTouchEventArgs args)
Parameters
Type Name Description
ModifierTouchEventArgs args
Returns
Type Description
boolean
Overrides

onTouchMove(ModifierTouchEventArgs args)

Called when MotionEvent#ACTION_MOVE event occurs

Declaration
protected boolean onTouchMove(ModifierTouchEventArgs args)
Parameters
Type Name Description
ModifierTouchEventArgs args
Returns
Type Description
boolean
Overrides

onTouchUp(ModifierTouchEventArgs args)

Called when MotionEvent#ACTION_UP event occurs

Declaration
protected boolean onTouchUp(ModifierTouchEventArgs args)
Parameters
Type Name Description
ModifierTouchEventArgs args
Returns
Type Description
boolean
Overrides

removeRubberBandAnnotation()

Declaration
protected void removeRubberBandAnnotation()

setAnnotationCreationListener(OnAnnotationCreatedListener listener)

Sets the OnAnnotationCreatedListener called when the annotation is fully created (both points placed).

Declaration
public final void setAnnotationCreationListener(OnAnnotationCreatedListener listener)
Parameters
Type Name Description
OnAnnotationCreatedListener listener

setBasePointFor(tradingAnnotations.TradingAnnotationBase annotation, PointF point)

Sets a base point on the trading annotation at the given touch position. Only called on touch-up (or from a resolved drag gesture) to avoid triggering internal ghost-line artifacts.

Declaration
protected void setBasePointFor(tradingAnnotations.TradingAnnotationBase annotation, PointF point)
Parameters
Type Name Description
tradingAnnotations.TradingAnnotationBase annotation
PointF point

setLabelFormat(tradingAnnotations.FibonacciRetracementAnnotation.LabelFormat labelFormat)

Sets the label text format applied to each FibonacciRetracementAnnotation created by this modifier. Pass null to auto-select based on the label placement.

Declaration
public final void setLabelFormat(tradingAnnotations.FibonacciRetracementAnnotation.LabelFormat labelFormat)
Parameters
Type Name Description
tradingAnnotations.FibonacciRetracementAnnotation.LabelFormat labelFormat

setLabelPlacement(tradingAnnotations.FibonacciRetracementAnnotation.LabelPlacement labelPlacement)

Sets the label placement applied to each FibonacciRetracementAnnotation created by this modifier.

Declaration
public final void setLabelPlacement(tradingAnnotations.FibonacciRetracementAnnotation.LabelPlacement labelPlacement)
Parameters
Type Name Description
tradingAnnotations.FibonacciRetracementAnnotation.LabelPlacement labelPlacement

setLabelVerticalPosition(tradingAnnotations.FibonacciRetracementAnnotation.LabelVerticalPosition labelVerticalPosition)

Sets the label vertical position applied to each FibonacciRetracementAnnotation created by this modifier.

Declaration
public final void setLabelVerticalPosition(tradingAnnotations.FibonacciRetracementAnnotation.LabelVerticalPosition labelVerticalPosition)
Parameters
Type Name Description
tradingAnnotations.FibonacciRetracementAnnotation.LabelVerticalPosition labelVerticalPosition

setLinePoint(LineAnnotation line, PointF point, boolean isStart)

Declaration
protected static void setLinePoint(LineAnnotation line, PointF point, boolean isStart)
Parameters
Type Name Description
LineAnnotation line
PointF point
boolean isStart

setRubberBandAnnotationPoints(IAnnotation annotation, PointF fromPoint, PointF toPoint)

Sets both the start and end points of the rubber-band preview annotation.

Declaration
protected void setRubberBandAnnotationPoints(IAnnotation annotation, PointF fromPoint, PointF toPoint)
Parameters
Type Name Description
IAnnotation annotation
PointF fromPoint
PointF toPoint

setRubberBandStroke(PenStyle stroke)

Declaration
public final void setRubberBandStroke(PenStyle stroke)
Parameters
Type Name Description
PenStyle stroke

setXAxisId(String xAxisId)

Declaration
public final void setXAxisId(String xAxisId)
Parameters
Type Name Description
String xAxisId

setYAxisId(String yAxisId)

Declaration
public final void setYAxisId(String yAxisId)
Parameters
Type Name Description
String yAxisId

updateRubberBandEndPoint(PointF toPoint)

Declaration
protected void updateRubberBandEndPoint(PointF toPoint)
Parameters
Type Name Description
PointF toPoint